Finding the Third Proportional to 67,790 and 140,296

Step by Step Solution

1. Step 1: Write the proportion equation
   67,790 : 140,296 = 140,296 : x
2. Step 2: Convert to fraction form
   67,790/140,296 = 140,296/x
3. Step 3: Cross multiply
   67,790x = 140,296 × 140,296
4. Step 4: Simplify right side
   67,790x = 19,682,967,616
5. Step 5: Solve for x
   x = 19,682,967,616/67,790
6. Step 6: Final answer
   x = 290,352.08